Question: Who is the {human} with the {MIN(Erdős number)} whose {occupation} is {mathematician} ?
Paraphrase: Who is the mathematician with the minimum Erdős number?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q5 . ?ent wdt:P2021 ?obj . ?ent wdt:P106 wd:Q170790. } ORDER BY ASC(?obj)LIMIT 5 
Answer: Paul Erdős, Maria Klawe, Frances Yao, Pál Turán, Esther Szekeres